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IMPROVED METHOD 0E MAKING SHET-MBTAL VESSELS 0F TWO THIGKINESSES.

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Speciication of an improved Method of Working Metals, invented by PHILIP P. MEYER, of the city, county, and State of New York. l

The object of my invention to form vessels offtwo or more kinds of metals, pnt together'in such aman. ner that the least corrosive metal of which the inside of a vessel is formed, as/ t' for example, and which is usually the most expensive, shall be of sulcient thickness, and be strengthenedby-djeoarser and cheaper metal or metals applied over or around it. It consists in first spinning on a chuck of suitable form avcoating of tin or other incorrosive metal of any desiredrthickness, and then spinning on over the saidcoating another coating of l lead, copper, or other cheaper metal, t'o strengthen, stitfen, and protect the interior metal, in the manner and fort-he purpose hereinafter set forth. i

In order to give additional strength or stillness to these metals, rings or.bars of. iron, steel, or other metal may be put on after the inner coating is spun on, and the outerI coating of metal spun over the whole. This method is principally useful in nokingvessels which are destined to contain acids Vor other/substances which would be .deteriorated by coming into contact with lead, copper, iron, and other of, the mor'e corrosive metals, which-vessels are commonly lined with a thin coating of tin, which, however, quickly wea-rs .off Yand leaves thc metal underneath exposed. 'Bymy'process the tin or otherA metal with which the vlessel lis lined may .be made' of any thickness desired, so that it may be made very much more durhble.V Vessels for preparing articles of food,such as the inner vessels of icecream freezers, have also been made wholly f tin, which renders them too expensive to 'permit them to come into common use, while by my process the ex'pense is much less. In the accompanying drawingsy Figure 1 is a side elevation of a small'vessel'oflead andtin made by myimprved process.

Figune2is a sentii-.al centulhection of them Figure 3 is a side elevation of'a small vessel of copper and tin.

Figure 4 is u. vertical central section of the same. 4

A, tig. 2, is the inner coating of tin. It is taken in a soft state and spun on over a chuck having the form of the interior ofthe vessel which it is intended to make. lB are wires of iron or other stimetal which are fastened to Athe outside of the lining A. C- is a. coating of lead which is then-spun on over the lining A and the wires B. This lead can be spun down to the coating A, so' as to make u perfect contact between them, but if it is found that thecontact is not perfect, it can very easily be made so by inserting the vessel in a'suitablc hollpw chuck andopcning the lining out to meet vth'e said coating C. D, 5g. 4, is the lining of tin, and E the covering of copper of a vessel very commonly used in chemical laboratories. In place of tin, the lining may be made of silver, gold, Vor other metal whenthe vessel is to contain the more powerful acids, 3ro.

Other vessels of any shape desired may be made in this way by .providing chucks of suitable shape on which to spin them; it being necessary, of course, when the nook or Itop of a vessel is of smaller diameter than some parts of its body, to provide a chuckwhich may be removed in pieces. Vessels or other hollow articles `may be made by spinning-tho outside into a hollow chuck, and then, having formed the lining of nearly the properI shape on the outside of u solid chuck, by spinning the lining into the covering. vShould it be desired,

a coating of tin may also. be spun on over thel covering, which gives strength to the vessel, which would beA desirable in case thevessel ,was destined to have its outside brought in .ontlet with the acid or other'corroding substance.

, I am aware that attempts have been made to form vessels of tin and other cheaper' metals, combined by forming sheets of the two vessels rolled together or joined by casting a coating of lead over tin and then spinning a vessel out of the resulting sheet of metal. I am also aware that vessels of various shapes have been made by spinning up various metals. These I do not claim.

Iclaim-- l 1. 'The process described for forming u. vessel of two. or more metals by -spinning them one upon the other, for the purpose set forth.' i

2. The combination with avessel constructed of two or more metals spun together as set forth, of strengthening bars or rings, substantially as herein set forth.

PHILIP P. MEYER.

Witnesses I A M. F. Gluem, .Turns Wnsron. 

